/usr/lib/python3/dist-packages/glances/exports/glances_prometheus.py is in glances 2.11.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2017 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Prometheus interface class."""
import sys
from datetime import datetime
from numbers import Number
from glances.logger import logger
from glances.exports.glances_export import GlancesExport
from glances.compat import iteritems
from prometheus_client import start_http_server, Gauge
class Export(GlancesExport):
"""This class manages the Prometheus export module."""
METRIC_SEPARATOR = '_'
def __init__(self, config=None, args=None):
"""Init the Prometheus export IF."""
super(Export, self).__init__(config=config, args=args)
# Optionals configuration keys
self.prefix = 'glances'
# Load the Prometheus configuration file section
self.export_enable = self.load_conf('prometheus',
mandatories=['host', 'port'],
options=['prefix'])
if not self.export_enable:
sys.exit(2)
# Init the metric dict
# Perhaps a better method is possible...
self._metric_dict = {}
# Init the Prometheus Exporter
self.init()
def init(self):
"""Init the Prometheus Exporter"""
try:
start_http_server(port=int(self.port), addr=self.host)
except Exception as e:
logger.critical("Can not start Prometheus exporter on {}:{} ({})".format(self.host, self.port, e))
sys.exit(2)
else:
logger.info("Start Prometheus exporter on {}:{}".format(self.host, self.port))
def export(self, name, columns, points):
"""Write the points to the Prometheus exporter using Gauge."""
logger.debug("Export {} stats to Prometheus exporter".format(name))
# Remove non number stats and convert all to float (for Boolean)
data = {k: float(v) for (k, v) in iteritems(dict(zip(columns, points))) if isinstance(v, Number)}
# Write metrics to the Prometheus exporter
for k, v in iteritems(data):
# Prometheus metric name: prefix_<glances stats name>
metric_name = self.prefix + self.METRIC_SEPARATOR + name + self.METRIC_SEPARATOR + k
# Prometheus is very sensible to the metric name
# See: https://prometheus.io/docs/practices/naming/
for c in ['.', '-', '/', ' ']:
metric_name = metric_name.replace(c, self.METRIC_SEPARATOR)
# Manage an internal dict between metric name and Gauge
if metric_name not in self._metric_dict:
self._metric_dict[metric_name] = Gauge(metric_name, k)
# Write the value
self._metric_dict[metric_name].set(v)
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